Do your kids believe in Santa?

My husband and I are leaning towards not pretending that Santa is real (our son is only four months old). I am worried about him potentially ruining Christmas for other children like the kids at school or his cousins. Do you tell your children that there is a Santa? If yes, would you be upset if another child spoiled the fun? If no, are you worried about spoiling the fun for someone else?

This could be a stock answer to any question. I was just curious how others handle this. I take parenting seriously and I think it's perfectly legitimate to worry about how others would feel if our choice ruined their traditions.

We didn't do the Santa thing until my son decided he wanted to do it. He was almost 5 so he knew there was no Santa, it just seemed like a game that he could play with his friends. He stopped doing that after a while, but he doesn't believe in ruining it for his friends who really believe. As his friends learn the truth about Santa, he's right there to help them transition into *being* Santas. He believes that once kids learn that there is no jolly guy in a bright red suit they are ready to be let in on what he calls "the secret", namely that "Santa" is the spirit of giving and that he "lives" inside each of us.

We don't tell them that the things r from Santa, but we also haven't had to say that santa wasn't real yet. It's a lie and being a christian ur not supposed to lie(wiether it's to ur children or not they learn by example and if u lie they think it is ok, that's not something i want to teach my children). We do set stuff out like others would but they r 4, 2, and 9m so we haven't had to really explain yet. When u have to explain make sure that u tell them that other's believe in santa so it's ur secret that he is not real, but make sure that they know that u anly have secret's with mommy and daddy.